10 EDGAR A. SMITH. 



suture, which is only .slightly oblique ; aperture rouuded, a little longer thau broad ; 

 peristome contiuuous, the outer or right margin being simple and unthickened, and the 

 coiumellar edge is slightly reflexed. 



Length, 3'5 millim. ; diam., 2 ; aperture, 1 '2 long. 



Holes 10, 12. In 25 and 127 fathoms. 



A smooth shell without any striking features. Two specimens only were obtained. 

 They differ from the other smooth species here described, R. adarensis and R. deserta, in 

 form. The body-whorl is broader than that of the former, so that the spire looks more 

 conical,- and the spire is more produced than that of the latter, the mouth of which is 

 larger and rounder than in the present species. 



LOVENELLA ANTARCTICA. 



(PI. II., figs. 6, 6a.) 



Shell elongate, subulate, white, not very sharp at the apex ; whorls 9, rather 

 convex, gradually enlarging, separated by a slightly oldique suture, the three apical 

 very finely and closely longitudinally costate, the rest transversely ridged, and marked 

 with fine lines of growth ; ridges or lirse, generally four in number on the upper 

 volutions, and about eight on the last whorl, which is contracted anteriorly into a short 

 rostrum ; aperture subovate, produced in front into a short, slightly oblique, open canal ; 

 outer lip or labrum thin, simple ; columella arcuate in the middle, obliquely truncate 

 beneath. 



Length, 7*25 millim. ; diam., 2*5 ; aperture, 1'75 long. 



Operculum (fig. 6a) thin, brown, ovate, paucispiral, consisting of about three 

 whorls, the nucleus being lateral, but somewhat within the margin. 



Hole 4. In 41 fathoms. 



This very interesting species is at once recognisable on account of the difference of 

 sculpture of the upper and lower whorls. The minute apex is smooth and involuted. 

 The first of the costate whorls has about eighteen to twenty-five riblets, which increase 

 somewhat in number on the next whorl, being closer together. There does not appear 

 to be any transverse sculpture on these whorls. The lines of growth on the lower 

 volutions are rather distinct, especially between the spiral lirae. The base of the body- 

 whorl, around the columella, is rather smooth. The type of the genus, Lovenella metula 

 (Loven), has the second whorl finely and closely costellate, in a manner very similar to 

 that which obtains in the present species. 



VaLVATELLA DULC'IS. 



(PI. II., fig. 8.) 



Shell turbinate, narrowly but deeply umbilicated, iridescent blue, more or less 

 obscured by whitish, close-set, oblique, thread-like lines of growth and less pearly spiral 

 lirse ; whorls 5-5 g, convex, the first 2| yellowish, the penultimate with three or four 



